JPH11148569A - Passage selector device of water cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a slow closing motion of a valve element certainly. SOLUTION: A spring 20 to energize in the separating direction is installed between the first drain valve 18 and the second drain valve 19, and a first selector valve 16 is installed between the first drain valve 18 and the first sat 10 is such a way as movable in the axial direction, while a second selector valve 17 is installed between the second drain valve 19 and the second seat 11 in such a way as movable in the axial direction. In the condition that the first drain valve 18 has a shape as fitted slidably in the second drain valve 19, a pressure chamber 21 is provided between the two valves 18 and 19, and the second drain valve 19 is equipped with a small hole 22 to put the inside of this pressure chamber 21 in communication with its outside. A packing 25 to admit only flowing-out of the water to outside the pressure chamber 21 from its inside is interposed between the tails 18a and 19a of the first and second drain valves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet flow switching device.

[0002]

2. Description of the Related Art Conventionally, for example, in a hot and cold water mixing tap, shower water, faucet water,
The handle is operated to switch the flow path to the three states of water stoppage, and together with the stopper rod, a drain valve is added in addition to the shower switching valve (and the faucet switching valve) which separates and sits on the seat portion. Although there is a flow path switching device configured to alleviate the water hammer phenomenon that occurs when the steering wheel operation is suddenly performed to change the state from the shower water discharge state (or the faucet water discharge state) to the water stop state, the flow path switching unit However, in a configuration in which only the shower switching valve and the drain valve and the faucet switching valve and the drain valve are provided, the function of reducing the water hammer phenomenon did not work effectively.

[0003] It is an object of the present invention to provide a water faucet flow switching device which can surely slow down the valve closing operation even if the valve closing operation of the flow switching unit is rapidly performed. I do.

[0004]

In order to achieve the above object, the present invention provides a tap rod insertion hole for communicating the outside of a faucet main body with a passage switching valve installation chamber provided in the faucet main body. In a state where the front end side is located in the flow path switching valve installation chamber and the rear end is located outside the faucet main body, a stopper rod is screwed into the stopper rod insertion hole, and the stopper rod flows into the rear end of the stopper rod. Provide a handle for road switching,
A ring body is provided at the tip of the plug, and first and second seat portions are provided coaxially with the plug at the tip side and the rear end side of the plug in the flow path switching valve installation chamber, respectively. A first outlet for water introduced between the first and second sheet portions is provided downstream of the portion, and a first outlet for water introduced between the first and second sheet portions is provided downstream of the second sheet portion. While providing a second water outlet, the first drain valve and the second drain valve are externally fitted to the plug so as to be movable in the axial direction of the plug, and A spring is provided between the drain valve and the second drain valve for urging the two in the separating direction, and the first switching valve seated on the first seat portion is connected to the first drain valve and the second drain valve. A second switching valve which is provided between the first seat portions so as to be movable in the axial direction, and which is seated on the second seat portion; A second drain valve is provided between the second seat portions so as to be movable in the axial direction, and a rear end of the first drain valve and a rear end of the second drain valve are the first drain valve. A pressure chamber is provided between the first drain valve and the second drain valve in a state in which the pressure chamber is slidably fitted in the second drain valve. A small hole communicating with the outside of the pressure chamber is provided in the second drain valve, and a packing allowing only outflow of water from the inside of the pressure chamber to the outside of the pressure chamber is interposed between the rear ends. Features.

[0005]

Embodiments of the present invention will be described below. Note that the present invention is not limited thereby.

FIGS. 1 to 5 show an embodiment of the present invention. 1 to 5, reference numeral 1 denotes a hot and cold water mixing tap main body (hereinafter, referred to as a water mixing tap main body).
A flow path switching valve installation chamber 3 is provided downstream of the hot and cold water introduction chamber 2 communicating with a mixing chamber (not shown). Reference numeral 4 denotes a holder fitted into the main body 1, and a stopper rod insertion hole 5 for communicating the outside of the main body 1 with the flow path switching valve installation chamber 3 is provided at the center.

A stopper rod 6 is screwed into the insertion hole 5 with the front end positioned in the flow path switching valve installation chamber 3 and the rear end positioned outside the main body 1. Reference numeral 7 denotes an E-ring provided at the tip of the plug 6. Reference numerals 8 and 8 denote a pair of valve receivers, which are fitted on the plug 6 so as to be movable in the axial direction of the plug 6. At the rear end of the plug 6, there is provided a handle 9 for switching the flow path between three states of shower water discharge, faucet water discharge, and water stoppage.

Reference numeral 10 denotes an annular first seat portion which functions as a valve seat formed on the main body 1, and 11 functions as a valve seat formed on the holding body 4 on the side of the passage switching valve installation chamber 3. It is an annular second seat portion. As is clear from the drawing, the diameter of the second sheet portion 11 is set to be slightly longer than that of the first sheet portion 10. And the first sheet part 1
A water outlet (first outlet) 13 for a shower 12 of hot and cold water introduced between the first and second sheet portions 10 and 11 is provided on the downstream side of 0. In addition, a water outlet (second outlet) 1 for the faucet 14 of hot and cold water introduced between the first and second sheet portions 10 and 11 downstream of the second sheet portion 11.
5 is provided.

Reference numeral 16 denotes a switching valve for shower (first switching valve) seated on the first seat portion 10, and 17 denotes a switching valve for faucet (second switching valve) seated on the second seat portion 11. Valve). Also, 18 is the shower switching valve 16.
Reference numeral 19 denotes a second drain valve on the faucet switching valve 17 side. These drain valves 18 and 19 are
The plug 6 is externally fitted to the plug 6 so as to be movable in the axial direction. In addition, between the drain valves 18 and 19,
A spring 20 is provided for urging 8, 8 in the separating direction.

The switching valve 16 for shower is provided so as to be movable in the axial direction between the first drain valve 18 and the first seat portion 10. The faucet switching valve 17 is provided so as to be movable in the axial direction between the second drain valve 19 and the second seat portion 11.

A feature of the present invention is that the provision of a pressure chamber 21 described later between the two drain valves 18 and 19 makes it possible to reliably reduce the water hammer phenomenon. doing.

That is, the rear end 18a of the drain valve 18
Is formed to include a large-diameter annular recess A, and a rear end portion 19a of the drain valve 19 is formed to include a horizontally-long large-diameter flange B so as to cover the annular recess A. The drain valve 18 is configured to fit inside the drain valve 19 slidably in the axial direction via the annular recess A and the flange B. With this configuration, the double drain valve 1
A pressure chamber 21 is formed between 8 and 19.

The pressure chamber 21 has a small hole 22 communicating between the inside and the outside of the water drain valve 19 and the pressure chamber 21.
The inside of the annular recess A has a Y-packing 25 that allows only outflow of hot water from the inside of the pressure chamber 21 to the outside of the pressure chamber 21.

When the valve opening operation is performed from the water stop state (see FIG. 4A) to the initial shower water discharge state (see FIG. 4B), the stopper rod 6 moves in the S direction. I do. That is, as shown in FIG. 4 (B), the shower switching valve 16 is still seated on the first seat portion 10, while the drain valve 18 moves in the S direction together with the stopper rod 6. The gap M is formed between the water drain valve 18 and the shower switching valve 16 located outside the drain valve 18 by the ring 7 and is slightly pushed in the S direction via the valve receiver 8. A state occurs in which the hot water or water in the inside escapes from the small hole 22.
Then, the water outlet 13 of the shower 12 passes through the gap M.
Hot water starts flowing.

Further, as shown in FIG. 5 (A), during the movement of the plug 6 in the S direction, the drain valve 18 is connected to the drain valve 19 via the annular recess A and the flange B by a distance S. The shower switching valve 16 is separated from the first seat portion 10 and the hot water flows from the shower 12 vigorously.

When the handle 9 is suddenly operated to stop the water after using the shower, as shown in FIG. 5B, the switching valve 16 for the shower is caused by the flow of hot water and the first sheet. Although the seat is pushed by the part 10 and seated, since the gap M is in a high pressure state, the drain valve 18 does not immediately move in the closing direction. That is, the drain valve 18 does not come into contact with the valve receiver 8 and the shower switching valve 16, and
The drainage valve 18 is moved in the closing direction by increasing the volume of the pressure chamber 21 with hot water that is gradually introduced from Step 2. In this case, hot and cold water from the pressure chamber 21 to the outside is transferred between the Y packing 25 and the drain valve 18 and the Y packing 25.
And it flows out between the drain valves 19. As described above, even if the valve closing operation is performed rapidly, the valve closing operation of the drain valve 18 can be surely made slow, so that the water hammer phenomenon occurs when the operation of the handle 9 is performed rapidly. Can be prevented.

[0017]

As described above, according to the present invention, a pressure chamber is provided between the first drain valve and the second drain valve, and the small chamber for communicating the inside of the pressure chamber with the outside of the pressure chamber. Since a hole is provided in the second drain valve and a packing allowing only outflow of water from the inside of the pressure chamber to the outside of the pressure chamber is interposed between the rear ends of the two drain valves, the valve is closed. Even if the operation is suddenly performed, the valve closing operation can be surely slowed down,
It is possible to prevent a water hammer phenomenon that occurs when the handle is operated suddenly.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an overall configuration showing an embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing a shower water discharge state and a faucet water discharge state in the embodiment.

FIG. 3 is an explanatory diagram of a main part configuration showing a water stop state in the embodiment.

FIG. 4 is a configuration explanatory view showing a water stopping state and a valve opening operation from the water stopping state to an initial shower water discharging state in the embodiment.

FIG. 5 is a configuration explanatory view showing the shower water discharge state and the valve closing operation from the shower water discharge state to the water stop state in the embodiment.

[Description of Symbols] 1 ... Hot and cold mixing tap body, 3 ... Flow path switching valve installation chamber, 6 ... Tap rod, 9 ... Handle, 10 ... First seat part, 11 ... Second
, 13 ... first outlet, 15 ... second outlet, 16 ... first switching valve, 17 ... second switching valve, 18 ...
First drain valve, 19: second drain valve, 20: spring, 21: pressure chamber, 22: small hole, 25: Y packing,
18a, 19a: rear end of drain valve, A: annular recess, B
... Flanges.

Claims (1)

[Claims] A plug insertion hole is provided so as to communicate between the outside of the faucet main body and a flow path switching valve installation chamber provided in the faucet main body. With the end located outside the faucet main body, a stopper rod is screwed into the stopper rod insertion hole, a handle for switching the flow path is provided at the rear end of the stopper rod, and a ring body is attached to the tip of the stopper rod. The first and second seats are provided coaxially with the stopper rod, respectively, on the front end side and the rear end side of the stopper rod in the flow path switching valve installation chamber, and the first and second seats are provided downstream of the first seat part. A first outlet for water introduced between the second sheet portions is provided, and a second outlet for water introduced between the first and second sheet portions is provided downstream of the second sheet portion. On the other hand, the first drain valve and the second drain valve are externally fitted to the plug so as to be movable in the axial direction of the plug, and the first drain valve is provided. A spring is provided between the valve and the second drain valve to bias the two in the separating direction, and the first switching valve seated on the first seat portion is connected to the first drain valve and the first seat. The second switching valve is provided between the first and second parts so as to be movable in the axial direction, and the second switching valve seated on the second seat part is the second switching valve.
Between the drain valve and the second seat portion so as to be movable in the axial direction. Further, the rear end of the first drain valve and the rear end of the second drain valve are the In a state where the first drain valve has a shape that is slidably fitted inside the second drain valve,
A pressure chamber is provided between the first drain valve and the second drain valve, and a small hole communicating between the inside of the pressure chamber and the outside of the pressure chamber is formed in a second hole.
A water drain valve, and a packing that allows only outflow of water from the inside of the pressure chamber to the outside of the pressure chamber is interposed between the two rear ends. Switching device.